Internet of Things
applications (containers) can be separated in hardware.
Industry recommendations and requirements
Industry bodies continue to formalise security requirements for IoT services and infrastructures, and increasingly are calling for hardware-level security and
Agency for Network and Information Security (ENISA) recommends that IoT devices employ a hardware-based immutable root of trust, with hardware incorporating security features to strengthen the protection and integrity of the device.
The automotive industry, also, is taking steps to counter the threats posed to
including encryption of software, with digital signing and key management to authenticate software and secure network transactions. In addition to the basic
recommendations, additional, special requirements can apply depending on the end-user market or application. Some examples include automotive vehicle-to-vehicle and vehicle-to- infrastructure (V2X), advanced driver- assistance systems (ADAS), and infotainment applications, which are subject to ISO-26262-2018 ASIL (B, C or D). On the other hand, some US government-focused chip designs call for FIPS 140-2 Cryptographic Module Validation Program (CMVP) certification requiring NSA Suite-B cryptography. Others, such as AI-accelerator chips, need features to secure training models, and training and inference data. The CryptoManager Root of Trust architecture gives chip designers flexibility to specify suitable IP blocks meeting these requirements.
Figure 3. Trusted provisioning services are needed to secure device connections and handle lifecycle management
root-of-trust principles to be incorporated. These include U.S. Department of Homeland Security (DHS) recommendations that IoT devices utilise chips with security integrated at the transistor level. The European Union
connected cars. Rambus security researchers have co-authored a document published by the automotive research consortium FASTR setting out guidelines for secure OTA (SOTA) vehicle updates, which calls for measures
Integrating security hardware into a secure supply chain Security threats against connected devices are known to exist from the earliest stage of manufacture and pre- delivery personalisation, to device on- boarding, OTA update, and secure handling at end of life. To ensure robust protection, the CryptoManager Root of Trust Core is designed to support associated security services that cover the complete device lifecycle. Important challenges include
protecting keys in insecure environments, provisioning keys as early as possible, such as at wafer sort or test, allowing access for configuring security functionality without exposing manufacturing secrets, and ensuring only authorised access to IC debug and test ports.
Rambus can support or provide
provisioning infrastructure for a Hardware Root of Trust that enables establishing the trust chain at an early point in device manufacture. This provisioning includes key delivery and programming, protection of sensitive debug and test traces, automated configuration of chip features, and secure audit and logging.
Conclusion
Keeping IoT end devices secure and protecting the data they contain is critical to ensure safety and maximise the value delivered by innovations such as smart infrastructures, smart factories, smart homes, connected cars, and mobile commerce, to name a few. Protection at the silicon level is needed to establish a root of trust for the exchange of sensitive data and commands. In conjunction with associated trusted
provisioning services to support the device supply chain and lifecycle, on-chip root of trust IP with a secure CPU can offload all sensitive processes from the host CPU to protect against online threats and overcome the vulnerabilities of conventional processors.
rambus.com
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